package api

import (
	"encoding/json"
	"net/http"
)

// GET /api/devices — list all known device states.
func (s *Server) handleListDevices(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, s.hub.Snapshot())
}

// GET /api/devices/{id}/track — GPS track for the map trail.
func (s *Server) handleTrack(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, s.hub.Track(r.PathValue("id")))
}

// POST /api/devices/{id}/command — push a command down to a device.
// Body: {"command":"...","payload":{...}}
func (s *Server) handleCommand(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	var body struct {
		Command string         `json:"command"`
		Payload map[string]any `json:"payload"`
	}
	if err := json.NewDecoder(r.Body).Decode(&body); err != nil || body.Command == "" {
		writeError(w, http.StatusBadRequest, "command required")
		return
	}
	if !s.hub.SendCommand(id, body.Command, body.Payload) {
		writeJSON(w, http.StatusNotFound, map[string]any{"error": "device not connected", "deviceId": id})
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"sent": true, "deviceId": id, "command": body.Command})
}

// DELETE /api/devices/{id} — forget a device's stored state (clears stale entries).
func (s *Server) handleForget(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	existed := s.hub.Forget(id)
	writeJSON(w, http.StatusOK, map[string]any{"removed": existed, "deviceId": id})
}